Please reference Yotatech: http://www.yotatech.com/f96/conformation-stock-speaker-sizes-125158/
It seems that they are 4" in the dash with a special Toyota mount - only two screw slots and 5-1/4" in the rear for an ex-cab
Try to use Toyota speaker adapter plugs so you don't need to cut wires and mess the electric system up. You can get them from Ebay or Amazon.I believe all the stock speakers are 4". Not 100% sure though
MICHELIN TIRES
6inches
The front speakers are 6.25" they can fit 6.75" and below.Possible fabrication needed may be needed. The rear door are actually 5" they do not make a 5" speaker so you have to get either a very slim mount 5.25" or use the 4".Try to use Toyota speaker adapter plugs so you don't need to cut wires and mess the electric system up. You can get them from Ebay or Amazon.
The 1985 Toyota stock rear speakers size is seven inches by five inches. The front speakers are three inches by five inches.
The stock speakers in a 1993 Toyota Corolla measure 4 inches in the front and 6 1/2 inches in the rear. The front speakers are located in the dash, and the rear speakers are located in the rear deck.
6 1/2 inch back and 5 1/4 front speakers
Some special editions of the 1st generation Toyota 4Runner came stock with 31x10.5-15 sized tires. If you contact the parts department at your local Toyota Dealership you can get the speedometer gear for this tire size, as long as you keep the stock gear. I have heard of people cramming 33 inch diameter tires with no modifications to the vehicle however I would not recommend this due to rubbing issues.
15 inch, then look at the sticker on the passanger door. It states the recommended tire they had on it.
Crutchfield shows the DOOR speakers to be 5 1/4" and the REAR speakers to be 6" X 8."
The front speakers for this car are 6 1/2 and the rear speakers are 5 1/4 size!
5 1/4 in the front and 6 1/2 in the back